One thing that can be done is have a receiver with the PL tone used to open the gate located at the office. Any time that tone is received, the office would know that someone was accessing the site. If it were not authorized, law enforcement could be dispatched to the site.
A controller interfaced to the radio at the office, such as the Zetron 38A, with a relay that can be controlled by a particular tone could alert the office that an access was in progress. Also a log of the access would be kept in the Zetron and could be read out at any time. 73 - Jim W5ZIT -----Original Message----- From: Paul M Schmitter <[EMAIL PROTECTED]> To: [email protected] Sent: Sat, 26 May 2007 8:20 pm Subject: Re: [Repeater-Builder] OT: Need to find a product to develop goodwill at a tower site(s) Biggest problem I can see is security. Anyone can receive the frequency and the tones. Simple to program a ham radio to the same freq and tone. Anybody with any radio experience will be able to open the gate(s). Might as well just leave the gates open. --- [EMAIL PROTECTED] wrote: > Hello to All, > > I am starting to develop a future ham repeater > relation with a tower site(s) owner and recently got > a request for something unusual. The company has a > fleet of VHF radio equipped vehicles. They want to > pull up to a site, enter a touch-tone sequence on > the mike, and open a security gate at the site. I > could kludge together something, but would rather > find something commercially available. Anytime I > have kludged something together, I have ended up > having to repair it for longer that I expected. > Something with a VHF receiver, TT decode and relay > contact output would be great. > > Any ides if this is even made commercially? I know > that some fire/ambulance departments use a similar > idea to open and close the firehouse door. Some > also have the ability to control traffic control > lights on their way to a situation. > > 73, Joe, k1ike > > > From: John Sichert <[EMAIL PROTECTED]> > To: [email protected] > Subject: Re: [Repeater-Builder] IFR COM-120A > Manual > Date: Thu, 24 May 2007 23:11:28 +0000 > --------------------------------- lweter, I know where I can get a COM-120B manual. I am not sure what the difference is. The service manual is $50 + shipping. John At 11:09 AM 5/24/2007, you wrote: >I just recently acquired a used IFR 120A but it needs calibration and >a manual. Does anyone know where I can obtain some version of the IFR >COM-120A oeprations manual for a reasonable price if not free? > > > > > > >Yahoo! Groups Links > > > ________________________________________________________________________ Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
